login

public function loginfacebook() {
        $user = "";
        $userId = $this->facebook->getUser();
        if ($userId) {
            try {
                $user = $this->facebook->api('/me?fields=id,name,link,email,gender');
            } catch (FacebookApiException $e) {
                $user = "";
            }
        } else {
             $this->facebook->destroySession();
        }


        if ($user!= "") {
            $email = $user['email'];
            $q = $this->db->select('email')->from('li_user')->where(array(
                        'email' => $email
                    ))->get();

            if ($q->num_rows() > 0) {

            $user_details = array(
                    'nama' => $user['name'],
                    'email' => $user['email'],
                    'user_status' => '1'
            );

            $condition['email'] = $user['email'];
            $this->model_register->updateuserbyfacebook($user_details, $condition);


            } else {

              $user_details = array(
                    'nama' => $user['name'],
                    'email' => $user['email'],
                    'user_status' => '1'
                );
        $this->model_register->adduserbyfacebook($user_details);

    }
       $this->session->set_userdata($user_details);
       redirect('welcome');
       }
}